American Single Roll
A single roll of wallpaper that measures 27" wide and 4-1/2 yards long. Packaged
in double roll bolts, an American double roll "bolt" contains 9 continuous yards
of wallpaper that covers approximately 56 square feet.
A small air pocket that forms behind the wallpaper during installation. Usual causes
of blisters include:
a) inadequate soaking or booking time which causes the paper to expand on the wall
b) temperatures below 50 degrees fahrenheit during installation;
c) air that has become trapped bBetween the wallpaper or border and the wall during
d) installation of wallpaper on a very porous wall that has not been properly sealed
(see "primer/sealer" below); e) aeration of the adhesive paste.
A continuous roll of wallpaper equivalent to two or more single rolls packaged together
(see "double roll" below).
Sometimes called the relaxing period, this is the process of folding, without creasing,
a recently pasted or wetted strip of wallpaper or border, with pasted sides together.
This allows the paste to soak into the wallpaper backing and prevents the paper
from expanding on the wall which creates blisters or air bubbles. Generally instructions
call for 1-2 minutes of book time once the paper has been pasted or wet to activate
A non-staining and odorless adhesive. Cellulose paste is often used when hanging
natural materials such as grasscloths, linens, silks and stringcloths. Cellulose
paste is highly recommended for hanging murals as well (see "murals" below).
An adhesive that has heavy solids and is usually of a starch origin that helps to
enhance its adherence ability. This type of paste will often cause staining and/or
cause the ink to flake from many types of wallpaper and border. Generally used for
A technique where a wallpaper liner (see "liner paper" below) is installed horizontally
and the decorative wallpaper is installed vertically. This ensures that the seams
do not fall in the same place and results in a more secure adhesion.
The area of a wall from the baseboard to the chair rail. Customarily this area is
equal to 1/3 the height of the wall. In most homes, 32" is a standard height for
molding at chair rail to fit the backs of chairs.
The condition when the backing of the wallpaper or border begins to separate from
the vinyl facing. This is often caused by excessive soaking or booking times (see
A pattern on wallpaper or border that must be installed in a particular direction
in order to be aesthetically pleasing.
A technique to obtain perfectly fitted seams. This is done by overlapping one strip
of wallpaper over the other until all patterns are perfectly matched. Then a sharp
blade is used to cut through both layers. The excess edges are then removed.
A continuous roll of wallpaper equivalent to two single rolls. Priced as two single
rolls, double rolls are packaged this way to give you more usable wallpaper with
less waste during installation.
Sometimes referred to as a half-drop match, it is a pattern match in which every
other strip of wallpaper is installed will have the same pattern design at the ceiling
line. This forms a diagonal pattern sequence, rather than the horizontal pattern
sequence created by a straight match (see "straight-across match" below).
Sometimes referred to as a Run Number or Batch Number, it is a letter, number or
combination of both that is given to a particular batch of wallpaper rolls or border
spools that are printed at the same time. It is important to record these numbers
in case additional wallpaper or border is needed at a later date. These numbers
help to ensure color continuity among rolls.
A small space that appears between strips of wallpaper that are hung side by side.
This usually occurs due to improperly prepared walls or excessive force being used
during the installation process (see "stretched wallpaper" below).
Deterioration of the ink resulting in the ink flaking off of the wallpaper or border.
Usual causes include: a) leaving adhesive paste on the decorative surface of the
wallpaper or border; b) use of abrasive detergents on the wallpaper or border.
When covering all four walls of a room, this is the position where the last strip
joins together with the first strip. This usually results in a mismatch of pattern.
For this reason, you should try to make the kill point in an inconspicuous area.
Wallpaper or border that has a decorative surface that is bonded to a Backing that
is usually paper or fabric. For example, grasscloth or clothbacked vinyl.
This pertains to length. It is the measaured distance between two points. This could
refer to such things as the height of a wall, the length of a strip of wallpaper,
or the length of a piece of border. Linear feet is the measurement required for
A thick, vinyl wallcovernig that is installed under the decorative wallcovering.
Available in a variety of weights, liners are used to smooth out rough or heavily
textured surfaces, or to cover paneling or cinderblock walls. Liners are usually
hung horizontally to provide cross-seaming (see "cross-seaming" above). Liners should
not be installed over individual plank or tongue-and-groove boards, as the wood
will expand and contract with changes in the weather and will stretch or rip the
liner during expansion, and/or wrinkle during contractions.
The technique of joining two strips of wallpaper so that partial designs or a sequence
of designs will line up properly. (e.g. Drop Match, Straight Match).
A finish on the wallpaper or border that has very little shine or reflective qualities.
Often referred to as a "dull" finish.
Metric Roll (Euro Roll)
A single roll of wallpaper that measures 20.5 inches wide and 5-1/2 yards long.
Packaged as double rolls (see "double roll" above), Euro rolls contain 11 continuous
yards of wallpaper that covers approximately 56 square feet.
A single picture or scene with no repeats. Murals can come packaged in panels that,
when installed properly, form the scene. Extreme care should be taken when installing
murals as each panel is numbered and there is no room for error. For helpful hints
with hanging your mural, go to our home page. Once there, locate the heading "Installation
Suggestions" and click on the link for "Working with Murals".
Seams between two installed strips of wallpaper that have separated, exposing the
wall. Usual causes of opened seams include: a) improper wall preparation; b) wallpaper
that has been overworked during the installation process.
Out of Register
This is when two or more ink colors in the pattern of a wallpaper or border are
printed out of line with one another, creating a shadow or ghostlike effect. This
is a defect that occurs during the printing process and out-of-register wallpapers
or borders should not be installed. If this occurs, contact a customer service representative
for a replacement of the defective product.
Wallpaper or border of which the front and middle layers can be stripped away, exposing
the backing material and making removal easier. Once the backing is exposed, it
can then be saturated with hot soapy water or one of the various removal products
on the market today, and easily scraped from the wall.
A primer/sealer (see "primer/sealer" below) that dries white instead of clear. This
helps to block out discolorations or spots on the wall. This is often used when
installing wallpaper over new drywall or when installing new wallpaper or border
over existing wallpaper or border. See the homepage link for "preparing your walls"
for more information.
Wallpaper or border that has an adhesive sprayed or coated on the backing. This
adhesive is water soluble and is activated by soaking the wallpaper or border in
a water tray or bathtub. Be careful not to oversoak your wallpaper or border as
this may dissolve too much of the adhesive and result in inadequate adhesion to
the wall. Also allow proper 'booking' of the paper once wet to allow the paste to
even activate (see 'booking').
Wallpaper in which the selvage edges have been removed at the mill before packaging.
Most wallpapers come pre-trimmed to make installation easier.
An alkyd or acrylic-based liquid applied to the wall prior to wallpaper installation.
Primer/sealers soak into a porous wall surface much like sizing (see 'sizing' below).
However, acrylic-based primer/sealers also soak into latex paint and re-bond the
paint to the wall. This is important because most wallpapers expand when wet, as
they dry they tighten to the wall. Poor latex paint will pull away from the wall
during this drying stage.
The technique of hanging wallpaper horizontally instead of vertically. This is usually
done above windows and/or doors. Wall liners (see "liner paper" above) and borders
are also installed in this fashion.
A technique used to uncurl a roll of wallpaper or border by unrolling it and re-rolling
it in the opposite direction from how it was packaged.
A technique of installing wallpaper in which every other strip is hung upside down.
This ensures that the lighter and/or darker edges of textured wallpapers come together
to minimize shading.
The process of sanding, scraping or etching the vinyl surface of a wallpaper or
border in preparation for removal. Scoring allows the removal solution to reach
the paper backing of the wallpaper or border and dissolve the adhesive. There are
commercial 'scoring' tools available.
Wallpaper or border that has a sprayed vinyl or solid vinyl surface and can endure
more vigorous washing with warm water and a mild soap. Scrubbable wallpapers should
not be cleaned with abrasive detergents.
A wallpaper or border that usually has a fairly light background color that will
allow for darker colors from the wall surface to show through. A pigmented primer/sealer
(see "pigmented primer/sealer" above) should be used prior to installation of the
wallcovernig if there is a possibility of this occurring.
A European single roll is 20.5 inches wide and 5-1/2 yards long, covering approximately
27 square feet of area. An American single roll is 27 inches wide and 4-1/2 yards
long, covering approximately 27-30 square feet of area. Though wallpaper is priced
as single rolls, it is packaged in double roll bolts.
A liquid mixture that is applied to the wall prior to wallpaper installation. Sizing
creates a uniform porosity on the surface of your wall and increases the tack of
the wallpaper during installation. Sizing should not be mistaken for a primer/sealer
(see "primer/sealer" above).
A type of wallpaper or border that has a paper or fabric backing laminated to a
solid vinyl facing. These papers are often used in high traffic areas such as kitchens,
bathrooms and children's rooms.
Sometimes called a straight match, it is a pattern match in which every strip of
wallpaper that is installed will have the same pattern sequence at the ceiling line.
This creates a horizontal pattern sequence, rather than the diagonal pattern sequence
created by a drop-match (see "drop match" above).
Horizontal stretching occurs when a wallpaper strip that has already begun to adhere
to the wall, is forced to stretch horizontally to join with a strip that is hung
next to it. Vertical stretching occurs as a result from the weight of long strips
of wallpaper that are held up for a period of time without being adhered to the
wall. Care should be taken to avoid stretching as much as possible as it may result
in gapped or mismatched seams (see "gapped seams" above).
Wallpaper or border that is easily removed without damaging the wall. Strippable
papers remove both the cover and backing at the same time.
A non-woven, non-paper medium used by York Wallcovering and others by different
names for printing on. This is a breathable medium which allows the drywall to function
as if it had nothing on it. It is even better than paint in allow breathability
and mold prevention. It goes up easy and comes down easy.
Wallpaper or border that has not been pre-pasted at the mill prior to packaging
(see "pre-pasted" above). Different adhesives work better with different papers;
you should always refer to the manufacturer's recommendations prior to purchasing
Wallpaper in which the selvage edges have not been removed at the mill prior to
packaging. Trimming is done by the installer and can be done using a straight edge
and razor knife prior to installation, or the wallpaper can be double-cut during
the installation process (see "double-cutting" above).
The quantity of wallpaper that is actually installed on the wall. This does not
include waste due to pattern match or allowances.
Vertical Pattern Repeat
The distance between one point on a pattern design to the next identical point,
Paneling or woodwork that covers the area from the baseboard to the chair rail.
This area is usually about 1/3 of the entire wall height.